1991 BMW 525i Repair Question
Mileage: 225,000 miles.
BMW 525i Battery Problem
Answer
factory or aftermarket??
Roy
A stock alarm is removable and the unit resides in the area around the glove box and is accessed through the under dash on the passenger side. Just disconnect it and the problem should be solved. Let us know if you have questions, Dr. Hagerty
Just to clarify, you should be looking for a control unit (box, usually black or silver) with a 20-40 pin connectors, one of which might be just black and red for power, 4 for door locks, and 10-15 for sensors and other controls.
I also show a "general module' in the passenger compartment fuse/relay block.
Since my original question regarding my immobilization alarm question, I have since changed out the OBC. The alarm has stopped and now the display says: PPPP what do I do Now?
New update: OBC is functional now but still no ignition or radio function. Next step?
1. With the car and power off, plug in the new OBC unit.
2. Turn car power on with key, but do not start car (radio works but ignition is not cranked.)
3. Push the "Code" button.
4. Push the S/R button.
5. Now without powering the car electrical system down, start the car.
6. Program your new unit which should be displaying 00.00 for the time setting.